var xmlhttp=false;

/*@cc_on @*/
/*@if (@_jscript_version >= 5)
// JScript gives us Conditional compilation, we can cope with old IE versions.
// and security blocked creation of the objects.
try {
 xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
 try {
  xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
 } catch (E) {
  xmlhttp = false;
 }
}
@end @*/

if (!xmlhttp && typeof XMLHttpRequest!='undefined') {
 try {
  xmlhttp = new XMLHttpRequest();
 } catch (e) {
  xmlhttp = false;
 }
}

if (!xmlhttp && window.createRequest) {
 try {
  xmlhttp = window.createRequest();
 } catch (e) {
  xmlhttp = false;
 }
}